diff --git a/src/components/schedule/tabs/group/group.component.html b/src/components/schedule/tabs/group/group.component.html
index c2d88b9..566594a 100644
--- a/src/components/schedule/tabs/group/group.component.html
+++ b/src/components/schedule/tabs/group/group.component.html
@@ -6,12 +6,13 @@
       </mat-panel-title>
     </mat-expansion-panel-header>
     <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseFaculty($event)">
-      @for (faculty of faculties | async; track $index) {
+      @for (faculty of faculties; track $index) {
         <mat-chip-option [value]="faculty.id" color="accent">
           {{ faculty.name }}
         </mat-chip-option>
       } @empty {
-        <app-loading-indicator [loading]="facultiesLoaded !== null" (retryFunction)="facultiesLoadRetry.emit()"/>
+        <app-loading-indicator [loading]="facultiesLoaded !== null"
+                               (retryFunction)="loadFaculties()"/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -22,14 +23,14 @@
         Курс
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseCourseNumber($event)" [formControl]="chipCourse">
-      @for (course of courseNumbers | async; track $index) {
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseCourseNumber($event)" [formControl]="formChipCourse">
+      @for (course of courseNumbers; track $index) {
         <mat-chip-option [value]="course" color="accent">
           {{ course }}
         </mat-chip-option>
       } @empty {
         <app-loading-indicator [loading]="groupsLoaded !== null"
-                               (retryFunction)="groupsLoadRetry.emit(this.facultyId!)"/>
+                               (retryFunction)="loadCourseGroup()"/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -40,14 +41,14 @@
         Группа
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseGroup($event)" [formControl]="chipGroup">
-      @for (group of filteredGroups | async; track $index) {
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseGroup($event)" [formControl]="formChipGroup">
+      @for (group of filteredGroups; track $index) {
         <mat-chip-option [value]="group.id" color="accent">
           {{ group.name }}
         </mat-chip-option>
       } @empty {
         <app-loading-indicator [loading]="groupsLoaded !== null"
-                               (retryFunction)="groupsLoadRetry.emit(this.facultyId!)"/>
+                               (retryFunction)="loadCourseGroup()"/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
diff --git a/src/components/schedule/tabs/group/group.component.ts b/src/components/schedule/tabs/group/group.component.ts
index 1b2c525..465258f 100644
--- a/src/components/schedule/tabs/group/group.component.ts
+++ b/src/components/schedule/tabs/group/group.component.ts
@@ -1,12 +1,13 @@
-import {Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
+import {Component, EventEmitter, Output, ViewChild} from '@angular/core';
 import {MatExpansionModule, MatExpansionPanel} from "@angular/material/expansion";
 import {MatChipListboxChange, MatChipsModule} from '@angular/material/chips';
-import {FormControl, ReactiveFormsModule} from "@angular/forms";
-import {AsyncPipe} from "@angular/common";
-import {map, Observable, of} from "rxjs";
+import {FormControl, FormsModule, ReactiveFormsModule} from "@angular/forms";
+import {catchError} from "rxjs";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
 import {GroupResponse} from "@api/v1/groupResponse";
 import {FacultyResponse} from "@api/v1/facultyResponse";
+import {FacultyService} from "@api/v1/faculty.service";
+import {GroupService} from "@api/v1/group.service";
 
 @Component({
   selector: 'app-group',
@@ -16,49 +17,98 @@ import {FacultyResponse} from "@api/v1/facultyResponse";
     MatChipsModule,
     ReactiveFormsModule,
     LoadingIndicatorComponent,
-    AsyncPipe
+    FormsModule
   ],
   templateUrl: './group.component.html',
-  styleUrl: './group.component.css'
+  styleUrl: './group.component.css',
+  providers: [FacultyService, GroupService]
 })
 
 export class GroupComponent {
   protected facultyId: number | null = null;
   protected courseNumber: number | null = null;
 
-  protected filteredGroups: Observable<GroupResponse[]> = of([]);
-  protected courseNumbers: Observable<number[]> = of([]);
-  protected groups: Observable<GroupResponse[]> = of([]);
+  protected filteredGroups: GroupResponse[] = [];
+  protected courseNumbers: number[] = [];
+  private groups: GroupResponse[] = [];
 
-  protected chipCourse: FormControl = new FormControl();
-  protected chipGroup: FormControl = new FormControl();
+  protected formChipCourse: FormControl = new FormControl();
+  protected formChipGroup: FormControl = new FormControl();
+
+  protected faculties: FacultyResponse[] = [];
 
   @ViewChild('courseNumberPanel') courseNumberPanel!: MatExpansionPanel;
   @ViewChild('groupPanel') groupPanel!: MatExpansionPanel;
 
-  @Input() faculties: Observable<FacultyResponse[]> = of([]);
-  @Input() facultiesLoaded: boolean | null = false;
-  @Output() facultiesLoadRetry: EventEmitter<void> = new EventEmitter<void>();
-  @Input() groupsLoaded: boolean | null = false;
-  @Output() groupsLoadRetry: EventEmitter<number> = new EventEmitter<number>();
+  protected facultiesLoaded: boolean | null = false;
+  protected groupsLoaded: boolean | null = false;
 
-  @Input() set setGroups(data: Observable<GroupResponse[]>) {
-    this.groups = data;
-    this.courseNumbers = this.groups.pipe(
-      map(data => data.map(g => g.courseNumber)),
-      map(courseNumbersArray => courseNumbersArray.filter((value, index, self) => self.indexOf(value) === index)),
-      map(uniqueCourseNumbers => uniqueCourseNumbers.sort((a, b) => a - b))
-    );
+  @Output() eventResult = new EventEmitter<number>();
+
+  constructor(private facultyApi: FacultyService, private groupApi: GroupService) {
+    this.loadFaculties();
   }
 
-  @Output() groupSelected = new EventEmitter<number>();
-  @Output() facultySelected = new EventEmitter<number>();
+  protected loadFaculties() {
+    this.facultiesLoaded = false;
+    this.facultyApi.getFaculties()
+      .pipe(catchError(error => {
+        this.facultiesLoaded = null;
+        throw error;
+      }))
+      .subscribe(data => {
+        this.faculties = data;
+        this.facultiesLoaded = true;
+      });
+  }
+
+  private filteringCourseNumber() {
+    this.courseNumbers = Array.from(
+      new Set(
+        this.groups
+          .filter(x => x.facultyId === this.facultyId)
+          .map(x => x.courseNumber)
+      )
+    ).sort((a, b) => a - b);
+  }
+
+  private filteringGroup() {
+    this.filteredGroups = this.groups.filter(x => x.facultyId === this.facultyId && x.courseNumber === this.courseNumber);
+  }
+
+  protected loadCourseGroup() {
+    if (this.groups.length === 0) {
+      this.groupsLoaded = false;
+
+      this.groupApi.getGroups().pipe(
+        catchError(error => {
+          this.groupsLoaded = null;
+          throw error;
+        })
+      ).subscribe(data => {
+        this.groups = data;
+        if (this.courseNumber === null)
+          this.filteringCourseNumber();
+        else
+          this.filteringGroup();
+
+        this.groupsLoaded = true;
+      });
+
+      return
+    }
+
+    if (this.courseNumber === null)
+      this.filteringCourseNumber();
+    else
+      this.filteringGroup();
+  }
 
   protected chooseFaculty(event: MatChipListboxChange) {
     this.courseNumber = null;
-    this.groups = of([]);
-    this.chipGroup.reset();
-    this.chipCourse.reset();
+    this.groups = [];
+    this.formChipGroup.reset();
+    this.formChipCourse.reset();
 
     if (event.value === undefined || event.value === null) {
       this.facultyId = null;
@@ -67,12 +117,12 @@ export class GroupComponent {
     this.facultyId = event.value;
     this.courseNumberPanel.open();
 
-    this.facultySelected.emit(this.facultyId!);
+    this.loadCourseGroup();
   }
 
   protected chooseCourseNumber(event: MatChipListboxChange) {
-    this.filteredGroups = of([]);
-    this.chipGroup.reset();
+    this.filteredGroups = [];
+    this.formChipGroup.reset();
 
     if (event.value === undefined || event.value === null) {
       this.courseNumber = null;
@@ -81,8 +131,7 @@ export class GroupComponent {
 
     this.courseNumber = event.value;
     this.groupPanel.open();
-    this.groups.subscribe(data =>
-      this.filteredGroups = of(data.filter(g => g.courseNumber === this.courseNumber)));
+    this.loadCourseGroup();
   }
 
   protected chooseGroup(event: MatChipListboxChange) {
@@ -90,6 +139,6 @@ export class GroupComponent {
       return;
 
     this.groupPanel.close();
-    this.groupSelected.emit(event.value);
+    this.eventResult.emit(event.value);
   }
 }
diff --git a/src/components/schedule/tabs/lecture-hall/lecture-hall.component.html b/src/components/schedule/tabs/lecture-hall/lecture-hall.component.html
index b132e17..faa01b9 100644
--- a/src/components/schedule/tabs/lecture-hall/lecture-hall.component.html
+++ b/src/components/schedule/tabs/lecture-hall/lecture-hall.component.html
@@ -6,12 +6,12 @@
       </mat-panel-title>
     </mat-expansion-panel-header>
     <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseCampus($event)">
-      @for (campus of campuses | async; track $index) {
+      @for (campus of campuses; track $index) {
         <mat-chip-option [value]="campus.id" color="accent">
           {{ campus.codeName }}
         </mat-chip-option>
       } @empty {
-        <app-loading-indicator [loading]="campusesLoaded !== null" (retryFunction)="campusesLoadRetry.emit()"/>
+        <app-loading-indicator [loading]="campusesLoaded !== null" (retryFunction)="loadCampuses()"/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -23,12 +23,12 @@
       </mat-panel-title>
     </mat-expansion-panel-header>
     <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseLectureHall($event)" [formControl]="chipLecture">
-      @for (lectureHall of lectureHalls | async; track $index) {
+      @for (lectureHall of lectureHallsFiltered; track $index) {
         <mat-chip-option [value]="lectureHall.id" color="accent">
           {{ lectureHall.name }}
         </mat-chip-option>
       } @empty {
-        <app-loading-indicator [loading]="lectureHallsLoaded !== null" (retryFunction)="lectureHallsLoadRetry.emit()"/>
+        <app-loading-indicator [loading]="lectureHallsLoaded !== null" (retryFunction)="loadLectureHalls()"/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
diff --git a/src/components/schedule/tabs/lecture-hall/lecture-hall.component.ts b/src/components/schedule/tabs/lecture-hall/lecture-hall.component.ts
index df06d01..8e90438 100644
--- a/src/components/schedule/tabs/lecture-hall/lecture-hall.component.ts
+++ b/src/components/schedule/tabs/lecture-hall/lecture-hall.component.ts
@@ -2,11 +2,13 @@ import {Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
 import {AsyncPipe} from "@angular/common";
 import {MatAccordion, MatExpansionModule, MatExpansionPanel} from "@angular/material/expansion";
 import {MatChipListboxChange, MatChipsModule} from "@angular/material/chips";
-import {Observable, of} from "rxjs";
+import {catchError, Observable, of} from "rxjs";
 import {FormControl, ReactiveFormsModule} from "@angular/forms";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
 import {CampusBasicInfoResponse} from "@api/v1/campusBasicInfoResponse";
 import {LectureHallResponse} from "@api/v1/lectureHallResponse";
+import {CampusService} from "@api/v1/campus.service";
+import {LectureHallService} from "@api/v1/lectureHall.service";
 
 @Component({
   selector: 'app-lecture-hall',
@@ -20,7 +22,8 @@ import {LectureHallResponse} from "@api/v1/lectureHallResponse";
     LoadingIndicatorComponent
   ],
   templateUrl: './lecture-hall.component.html',
-  styleUrl: './lecture-hall.component.css'
+  styleUrl: './lecture-hall.component.css',
+  providers: [CampusService, LectureHallService]
 })
 
 export class LectureHallComponent {
@@ -29,29 +32,66 @@ export class LectureHallComponent {
 
   @ViewChild('lecturePanel') lecturePanel!: MatExpansionPanel;
 
-  @Input() campuses: Observable<CampusBasicInfoResponse[]> = of([]);
-  @Input() campusesLoaded: boolean | null = false;
-  @Output() campusesLoadRetry: EventEmitter<void> = new EventEmitter<void>();
-  @Input() lectureHalls: Observable<LectureHallResponse[]> = of([]);
-  @Input() lectureHallsLoaded: boolean | null = false;
-  @Output() lectureHallsLoadRetry: EventEmitter<number> = new EventEmitter<number>();
+  protected campuses: CampusBasicInfoResponse[] = [];
+  protected campusesLoaded: boolean | null = false;
 
-  @Output() campusSelected = new EventEmitter<number>();
-  @Output() lectureHallSelected = new EventEmitter<number>();
+  private lectureHalls: LectureHallResponse[] = [];
+  protected lectureHallsFiltered: LectureHallResponse[] = [];
+  protected lectureHallsLoaded: boolean | null = false;
+
+  @Output() eventResult = new EventEmitter<number>();
+
+  constructor(private campusApi: CampusService, private lectureHallApi: LectureHallService) {
+    this.loadCampuses();
+  }
+
+  protected loadCampuses() {
+    this.campusesLoaded = false;
+    this.campusApi.getCampus()
+      .pipe(catchError(error => {
+        this.campusesLoaded = null;
+        throw error;
+      }))
+      .subscribe(data => {
+        this.campuses = data;
+        this.campusesLoaded = true;
+      });
+  }
+
+  private filteringLectureHalls() {
+    this.lectureHallsFiltered = this.lectureHalls.filter(x => x.campusId === this.campusId);
+  }
 
   protected chooseCampus(event: MatChipListboxChange) {
     this.chipLecture.reset();
 
     if (event.value === undefined || event.value === null) {
       this.campusId = null;
-      this.lectureHalls = of([]);
+      this.lectureHalls = [];
       return;
     }
 
     this.campusId = event.value;
     this.lecturePanel.open();
 
-    this.campusSelected.emit(this.campusId!);
+    if (this.lectureHalls.length === 0)
+      this.loadLectureHalls();
+    else
+      this.filteringLectureHalls();
+  }
+
+  protected loadLectureHalls() {
+    this.lectureHallsLoaded = false;
+    this.lectureHallApi.getLectureHalls()
+      .pipe(catchError(error => {
+        this.lectureHallsLoaded = null;
+        throw error;
+      }))
+      .subscribe(data => {
+        this.lectureHalls = data;
+        this.filteringLectureHalls();
+        this.lectureHallsLoaded = true;
+      });
   }
 
   protected chooseLectureHall(event: MatChipListboxChange) {
@@ -59,6 +99,6 @@ export class LectureHallComponent {
       return;
 
     this.lecturePanel.close();
-    this.lectureHallSelected.emit(event.value);
+    this.eventResult.emit(event.value);
   }
 }
diff --git a/src/components/schedule/tabs/professor/professor.component.html b/src/components/schedule/tabs/professor/professor.component.html
index 3fc2074..4a2ed0a 100644
--- a/src/components/schedule/tabs/professor/professor.component.html
+++ b/src/components/schedule/tabs/professor/professor.component.html
@@ -1,6 +1,6 @@
 <div class="search-content">
   @if (professors.length === 0) {
-    <app-loading-indicator [loading]="professorsLoaded !== null" (retryFunction)="professorsLoadRetry.emit()"/>
+    <app-loading-indicator [loading]="professorsLoaded !== null" (retryFunction)="loadProfessors()"/>
   } @else {
     <mat-form-field color="accent" style="width: 100%;">
       <input type="text" placeholder="Поиск..." matInput [formControl]="professorControl" [matAutocomplete]="auto">
diff --git a/src/components/schedule/tabs/professor/professor.component.ts b/src/components/schedule/tabs/professor/professor.component.ts
index 8b1e2ab..fffe10c 100644
--- a/src/components/schedule/tabs/professor/professor.component.ts
+++ b/src/components/schedule/tabs/professor/professor.component.ts
@@ -3,9 +3,10 @@ import {MatFormField, MatInput} from "@angular/material/input";
 import {FormControl, ReactiveFormsModule} from "@angular/forms";
 import {MatAutocompleteModule, MatAutocompleteSelectedEvent} from "@angular/material/autocomplete";
 import {AsyncPipe} from "@angular/common";
-import {map, Observable, startWith} from "rxjs";
+import {catchError, map, Observable, startWith} from "rxjs";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
 import {ProfessorResponse} from "@api/v1/professorResponse";
+import {ProfessorService} from "@api/v1/professor.service";
 
 @Component({
   selector: 'app-professor',
@@ -19,17 +20,37 @@ import {ProfessorResponse} from "@api/v1/professorResponse";
     LoadingIndicatorComponent
   ],
   templateUrl: './professor.component.html',
-  styleUrl: './professor.component.css'
+  styleUrl: './professor.component.css',
+  providers: [ProfessorService]
 })
 export class ProfessorComponent implements OnInit {
   protected professorControl = new FormControl();
   protected filteredProfessors!: Observable<ProfessorResponse[]>;
 
-  @Input() professors: ProfessorResponse[] = [];
-  @Output() professorSelected = new EventEmitter<number>();
+  protected professors: ProfessorResponse[] = [];
+  protected professorsLoaded: boolean | null = false;
 
-  @Input() professorsLoaded: boolean | null = false;
-  @Output() professorsLoadRetry: EventEmitter<void> = new EventEmitter<void>();
+  @Output() eventResult = new EventEmitter<number>();
+
+  constructor(private api: ProfessorService) {
+    this.loadProfessors();
+  }
+
+  protected loadProfessors() {
+    if (this.professors.length === 0) {
+      this.professorsLoaded = false;
+
+      this.api.getProfessors()
+        .pipe(catchError(error => {
+          this.professorsLoaded = null;
+          throw error;
+        }))
+        .subscribe(data => {
+          this.professors = data;
+          this.professorsLoaded = true;
+        });
+    }
+  }
 
   ngOnInit(): void {
     this.filteredProfessors = this.professorControl.valueChanges.pipe(
@@ -53,7 +74,7 @@ export class ProfessorComponent implements OnInit {
     const selectedOption = this.professors.find(teacher => teacher.id === event.option.value);
     if (selectedOption) {
       this.professorControl.setValue(selectedOption.name);
-      this.professorSelected.emit(selectedOption.id);
+      this.eventResult.emit(selectedOption.id);
     }
   }
 }
diff --git a/src/components/schedule/tabs/tabs.component.html b/src/components/schedule/tabs/tabs.component.html
index 06ee020..194d111 100644
--- a/src/components/schedule/tabs/tabs.component.html
+++ b/src/components/schedule/tabs/tabs.component.html
@@ -2,24 +2,17 @@
                (selectedTabChange)="chooseTabs($event)">
   <mat-tab label="Группа">
     <div>
-      <app-group (groupSelected)="groupSelected.emit($event)" (facultySelected)="groupLoad($event)"
-                               [setGroups]="groups" [faculties]="faculties" [facultiesLoaded]="facultiesLoaded"
-                               [groupsLoaded]="groupLoaded" (groupsLoadRetry)="groupLoad($event)"
-                               (facultiesLoadRetry)="facultyLoad()"/>
+      <app-group (eventResult)="groupSelected($event)"/>
     </div>
   </mat-tab>
   <mat-tab label="Преподаватель">
     <div>
-      <app-professor (professorSelected)="professorSelected.emit($event)" [professors]="professorsData" [professorsLoaded]="professorsLoaded" (professorsLoadRetry)="professorsLoad()"/>
+      <app-professor (eventResult)="professorSelected($event)"/>
     </div>
   </mat-tab>
   <mat-tab label="Кабинет">
     <div>
-      <app-lecture-hall (lectureHallSelected)="lectureHallSelected.emit($event)" [campuses]="campuses"
-                                      (campusSelected)="lectureHallLoad($event)" [lectureHalls]="lectureHalls"
-                                      [campusesLoaded]="campusesLoaded" [lectureHallsLoaded]="lectureHallsLoaded"
-                                      (campusesLoadRetry)="campusLoad()"
-                                      (lectureHallsLoadRetry)="lectureHallLoad($event)"/>
+      <app-lecture-hall (eventResult)="lectureHallSelected($event)"/>
     </div>
   </mat-tab>
   <mat-tab label="Другое">
diff --git a/src/components/schedule/tabs/tabs.component.ts b/src/components/schedule/tabs/tabs.component.ts
index 9b200b7..ce3eeba 100644
--- a/src/components/schedule/tabs/tabs.component.ts
+++ b/src/components/schedule/tabs/tabs.component.ts
@@ -1,38 +1,31 @@
-import {Component, EventEmitter, Output, ViewChild} from '@angular/core';
-import {HttpClientModule} from "@angular/common/http";
+import {Component, EventEmitter, Output} from '@angular/core';
 import {OtherComponent} from "@component/schedule/tabs/other/other.component";
 import {MatTab, MatTabChangeEvent, MatTabGroup} from "@angular/material/tabs";
-import {catchError, map, Observable, of, switchMap, tap} from "rxjs";
+import {map, Observable} from "rxjs";
 import {ReactiveFormsModule} from "@angular/forms";
-import {AsyncPipe, NgIf} from "@angular/common";
 import {MatButton} from "@angular/material/button";
 import {DataSpinnerComponent} from "@component/common/data-spinner/data-spinner.component";
-import {ProfessorResponse} from "@api/v1/professorResponse";
-import {FacultyResponse} from "@api/v1/facultyResponse";
-import {GroupResponse} from "@api/v1/groupResponse";
-import {CampusBasicInfoResponse} from "@api/v1/campusBasicInfoResponse";
-import {LectureHallResponse} from "@api/v1/lectureHallResponse";
-import {DisciplineService} from "@api/v1/discipline.service";
 import {GroupComponent} from "@component/schedule/tabs/group/group.component";
 import {ProfessorComponent} from "@component/schedule/tabs/professor/professor.component";
 import {LectureHallComponent} from "@component/schedule/tabs/lecture-hall/lecture-hall.component";
-import {FacultyService} from "@api/v1/faculty.service";
-import {GroupService} from "@api/v1/group.service";
-import {ProfessorService} from "@api/v1/professor.service";
-import {CampusService} from "@api/v1/campus.service";
-import {LectureHallService} from "@api/v1/lectureHall.service";
+import {ScheduleService} from "@api/v1/schedule.service";
+import {ScheduleResponse} from "@api/v1/scheduleResponse";
+
+export enum TabsSelect {
+  Group,
+  Professor,
+  LectureHall,
+  Other
+}
 
 @Component({
   selector: 'app-tabs',
   standalone: true,
   imports: [
-    HttpClientModule,
     OtherComponent,
     MatTabGroup,
     MatTab,
     ReactiveFormsModule,
-    AsyncPipe,
-    NgIf,
     MatButton,
     DataSpinnerComponent,
     GroupComponent,
@@ -41,171 +34,122 @@ import {LectureHallService} from "@api/v1/lectureHall.service";
   ],
   templateUrl: './tabs.component.html',
   styleUrl: './tabs.component.css',
-  providers: [FacultyService, GroupService, ProfessorService, CampusService, LectureHallService, DisciplineService ]
+  providers: [ScheduleService]
 })
 
 export class TabsComponent {
-  protected professorsData: ProfessorResponse[] = [];
+  @Output() eventResult = new EventEmitter<[TabsSelect, number, Observable<ScheduleResponse[]>]>();
 
-  protected faculties: Observable<FacultyResponse[]> = of([]);
-  protected groups: Observable<GroupResponse[]> = of([]);
-  private groupsData: Observable<GroupResponse[]> = of([]);
+  constructor(private scheduleApi: ScheduleService) {
+  }
 
   protected campuses: Observable<CampusBasicInfoResponse[]> = of([]);
   protected lectureHalls: Observable<LectureHallResponse[]> = of([]);
   private lectureHallsData: Observable<LectureHallResponse[]> = of([]);
+  protected groupSelected(id: number) {
+    this.eventResult.emit(
+      [
+        TabsSelect.Group,
+        id,
+        this.scheduleApi.getByGroup(id)
+          .pipe(
+            map(g =>
+              g.map(data =>
+                ({
+                  dayOfWeek: data.dayOfWeek,
+                  pairNumber: data.pairNumber,
+                  isEven: data.isEven,
+                  discipline: data.discipline,
+                  disciplineId: data.disciplineId,
+                  isExcludedWeeks: data.isExcludedWeeks,
+                  weeks: data.weeks,
+                  typeOfOccupations: data.typeOfOccupations,
+                  group: data.group,
+                  groupId: data.groupId,
+                  lectureHalls: data.lectureHalls,
+                  lectureHallsId: data.lectureHallsId,
+                  professors: data.professors,
+                  professorsId: data.professorsId,
+                  campus: data.campus,
+                  campusId: data.campusId,
+                  linkToMeet: data.linkToMeet
+                }))
+            )
+          )
+      ]
+    );
+  }
 
-  // States
-  protected facultiesLoaded: boolean | null = false;
-  protected groupLoaded: boolean | null = false;
-  protected campusesLoaded: boolean | null = false;
-  protected lectureHallsLoaded: boolean | null = false;
-  protected disciplinesLoaded: boolean | null = false;
-  protected professorsLoaded: boolean | null = false;
+  protected professorSelected(id: number) {
+    this.eventResult.emit(
+      [
+        TabsSelect.Professor,
+        id,
+        this.scheduleApi.getByProfessor(id)
+          .pipe(
+            map(p =>
+              p.map(data =>
+                ({
+                  dayOfWeek: data.dayOfWeek,
+                  pairNumber: data.pairNumber,
+                  isEven: data.isEven,
+                  discipline: data.discipline,
+                  disciplineId: data.disciplineId,
+                  isExcludedWeeks: data.isExcludedWeeks,
+                  weeks: data.weeks,
+                  typeOfOccupations: data.typeOfOccupations,
+                  group: data.group,
+                  groupId: data.groupId,
+                  lectureHalls: data.lectureHalls,
+                  lectureHallsId: data.lectureHallsId,
+                  professors: data.professors,
+                  professorsId: data.professorsId,
+                  campus: data.campus,
+                  campusId: data.campusId,
+                  linkToMeet: data.linkToMeet
+                }))
+            )
+          )
+      ]
+    );
+  }
 
-  @Output() groupSelected: EventEmitter<number> = new EventEmitter<number>();
-  @Output() lectureHallSelected: EventEmitter<number> = new EventEmitter<number>();
-  @Output() professorSelected: EventEmitter<number> = new EventEmitter<number>();
-
-  constructor(
-    private facultyApi: FacultyService,
-    private groupApi: GroupService,
-    private professorApi: ProfessorService,
-    private campusApi: CampusService,
-    private lectureHallApi: LectureHallService,
-    private disciplineApi: DisciplineService) {
-    this.facultyLoad().then();
+  protected lectureHallSelected(id: number) {
+    this.eventResult.emit(
+      [
+        TabsSelect.LectureHall,
+        id,
+        this.scheduleApi.getByLectureHall(id)
+          .pipe(
+            map(lh =>
+              lh.map(data =>
+                ({
+                  dayOfWeek: data.dayOfWeek,
+                  pairNumber: data.pairNumber,
+                  isEven: data.isEven,
+                  discipline: data.discipline,
+                  disciplineId: data.disciplineId,
+                  isExcludedWeeks: data.isExcludedWeeks,
+                  weeks: data.weeks,
+                  typeOfOccupations: data.typeOfOccupations,
+                  group: data.group,
+                  groupId: data.groupId,
+                  lectureHalls: data.lectureHalls,
+                  lectureHallsId: data.lectureHallsId,
+                  professors: data.professors,
+                  professorsId: data.professorsId,
+                  campus: data.campus,
+                  campusId: data.campusId,
+                  linkToMeet: data.linkToMeet
+                }))
+            )
+          )
+      ]
+    );
   }
 
   protected async chooseTabs(event: MatTabChangeEvent) {
     switch (event.index) {
-      case 0:
-        await this.facultyLoad();
-        break;
-      case 1:
-        this.professorsLoad();
-        break;
-      case 2:
-        await this.campusLoad();
-        break;
-      case 3:
-        await this.extensionLoad();
-        break;
-    }
-  }
-
-  protected async facultyLoad() {
-    if (this.facultiesLoaded === null) this.facultiesLoaded = false;
-    if (this.facultiesLoaded) return;
-
-    this.faculties = this.facultyApi.getFaculties().pipe(
-      tap(() => {
-        this.facultiesLoaded = true;
-      }),
-      catchError((error) => {
-        this.facultiesLoaded = null;
-        throw error;
-      })
-    );
-  }
-
-  protected groupLoad(id: number) {
-    if (this.groupLoaded === null) this.groupLoaded = false;
-
-    if (this.groupLoaded)
-      this.groups = this.groupsData.pipe(map(data => data.filter(x => x.facultyId === id)));
-    else
-      this.groups = this.groupApi.getByFaculty(id).pipe(
-        tap(() => {
-          this.groupLoaded = false;
-        }),
-        catchError((error) => {
-          this.groupLoaded = null;
-          throw error;
-        })
-      );
-  }
-
-  protected professorsLoad() {
-    if (this.professorsLoaded === null) this.professorsLoaded = false;
-
-    if (this.professorsLoaded) return;
-
-    this.professorApi.getProfessors().pipe(
-      catchError((error) => {
-        this.professorsLoaded = null;
-        throw error;
-      })
-    ).subscribe(data => {
-      this.professorsData = data;
-      this.professorEx.Data = data.map(x =>
-        ({
-          id: x.id,
-          name: x.altName ? x.altName : x.name,
-          selected: false
-        }));
-    });
-
-  }
-
-  protected async campusLoad() {
-    if (this.campusesLoaded === null) this.campusesLoaded = false;
-
-    if (this.campusesLoaded) return;
-
-    this.campuses = this.campusApi.getCampus().pipe(
-      tap(() => {
-        this.campusesLoaded = true;
-      }),
-      catchError((error) => {
-        this.campusesLoaded = null;
-        throw error;
-      })
-    );
-  }
-
-  protected lectureHallLoad(id: number) {
-    if (this.lectureHallsLoaded === null) this.lectureHallsLoaded = false;
-
-    if (this.lectureHallsLoaded)
-      this.lectureHalls = this.lectureHallsData.pipe(map(data => data.filter(x => x.campusId === id)));
-    else
-      this.lectureHalls = this.lectureHallApi.getByCampus(id).pipe(
-        tap(() => {
-          this.lectureHallsLoaded = false;
-        }),
-        catchError((error) => {
-          this.lectureHallsLoaded = null;
-          throw error;
-        })
-      );
-  }
-
-  protected async loadLectureHalls() {
-    if (!this.campusesLoaded)
-      await this.campusLoad();
-
-    if (!this.lectureHallsLoaded) {
-      this.lectureHallsData = this.lectureHallApi.getLectureHalls();
-      this.lectureHallsData.pipe(
-        switchMap(lectureHalls => this.campuses.pipe(
-          map(campuses => {
-            return lectureHalls.map(x => {
-              const campus = campuses.find(c => c.id === x.campusId);
-              const codeName = campus ? campus.codeName : '';
-              return {
-                id: x.id,
-                name: `${x.name} (${codeName})`,
-                selected: false
-              };
-            });
-          })
-        )),
-      ).subscribe(data => {
-        this.lectureHallEx.Data = data;
-        this.lectureHallsLoaded = true;
-        this.campusesLoaded = true;
-      });
     }
   }